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boinc/client/scheduler_op.C

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifdef _WIN32
#include "boinc_win.h"
#endif
#ifndef _WIN32
#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <ctime>
#endif
#include "util.h"
#include "parse.h"
#include "error_numbers.h"
#include "filesys.h"
#include "client_state.h"
#include "client_types.h"
#include "client_msgs.h"
#include "file_names.h"
#include "log_flags.h"
#include "main.h"
#include "scheduler_op.h"
using std::vector;
SCHEDULER_OP::SCHEDULER_OP(HTTP_OP_SET* h) {
state = SCHEDULER_OP_STATE_IDLE;
http_op.http_op_state = HTTP_STATE_IDLE;
http_ops = h;
}
// See if there's a pending master file fetch.
// If so, start it and return true.
//
bool SCHEDULER_OP::check_master_fetch_start() {
int retval;
PROJECT* p = gstate.next_project_master_pending();
if (!p) return false;
retval = init_master_fetch(p);
if (retval) {
msg_printf(p, MSG_ERROR,
"Couldn't start master page download: %s", boincerror(retval)
);
if (p->tentative) {
p->attach_failed(ERR_ATTACH_FAIL_INIT);
} else {
p->master_fetch_failures++;
backoff(p, "Master page fetch failed\n");
}
return false;
}
msg_printf(p, MSG_ERROR, "Fetching master file");
return true;
}
// Try to get work from eligible project with biggest long term debt
// PRECONDITION: compute_work_requests() has been called
// to fill in PROJECT::work_request
// and CLIENT_STATE::overall_work_fetch_urgency
//
int SCHEDULER_OP::init_get_work() {
int retval;
PROJECT* p = gstate.next_project_need_work();
if (p) {
retval = init_op_project(p, REASON_NEED_WORK);
if (retval) {
return retval;
}
}
return 0;
}
// try to initiate an RPC to the given project.
// If there are multiple schedulers, start with a random one.
// User messages and backoff() is done at this level.
//
int SCHEDULER_OP::init_op_project(PROJECT* p, SCHEDULER_OP_REASON r) {
int retval;
char err_msg[256];
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
reason = r;
scope_messages.printf(
"SCHEDULER_OP::init_op_project(): starting op for %s\n",
p->master_url
);
// if project has no schedulers,
// skip everything else and just get its master file.
//
if (p->scheduler_urls.size() == 0) {
retval = init_master_fetch(p);
if (retval) {
sprintf(err_msg,
"Master fetch initialization failed: %d\n", retval
);
backoff(p, err_msg);
}
return retval;
}
url_index = 0;
retval = gstate.make_scheduler_request(p);
if (!retval) {
retval = start_rpc(p);
}
if (retval) {
sprintf(err_msg,
"Scheduler request to %s failed: %s\n",
p->get_scheduler_url(url_index, url_random), boincerror(retval)
);
backoff(p, err_msg);
}
return retval;
}
// Set a project's min RPC time to something in the future,
// based on exponential backoff
//
int SCHEDULER_OP::set_min_rpc_time(PROJECT* p) {
double exp_backoff;
int n = p->nrpc_failures;
if (n > gstate.retry_cap) n = gstate.retry_cap;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
// we've hit the limit on master_url fetches
//
if (p->master_fetch_failures >= gstate.master_fetch_retry_cap) {
scope_messages.printf("SCHEDULER_OP::set_min_rpc_time(): we've hit the limit on master_url fetches\n");
exp_backoff = calculate_exponential_backoff("scheduler_op/master_url",
p->master_fetch_failures, gstate.sched_retry_delay_min,
gstate.master_fetch_interval
);
} else {
exp_backoff = calculate_exponential_backoff("scheduler_op",
n, gstate.sched_retry_delay_min, gstate.sched_retry_delay_max,
gstate.retry_base_period
);
}
p->set_min_rpc_time(gstate.now + exp_backoff);
// note: we don't need to print a message now, it will be printed the
// next time p->waiting_until_min_rpc_time() is called.
return 0;
}
// One of the following errors occurred:
// - connection failure in fetching master file
// - connection failure in scheduler RPC
// - got master file, but it didn't have any <scheduler> elements
// - tried all schedulers, none responded
// - sent nonzero work request, got a reply with no work
//
// Back off contacting this project's schedulers,
// and output an error msg if needed
//
void SCHEDULER_OP::backoff(PROJECT* p, const char *error_msg ) {
msg_printf(p, MSG_ERROR, error_msg);
if (p->tentative) {
p->attach_failed(ERR_ATTACH_FAIL_INIT);
return;
}
if (p->master_fetch_failures >= gstate.master_fetch_retry_cap) {
msg_printf(p, MSG_ERROR, "Too many backoffs - fetching master file");
p->master_url_fetch_pending = true;
} else {
// if nrpc failures is a multiple of master_fetch_period,
// then set master_url_fetch_pending and initialize again
//
if (p->nrpc_failures == gstate.master_fetch_period) {
p->master_url_fetch_pending = true;
p->min_rpc_time = 0;
p->nrpc_failures = 0;
p->master_fetch_failures++;
}
p->nrpc_failures++;
}
set_min_rpc_time(p);
}
// low-level routine to initiate an RPC
// If successful, creates an HTTP_OP that must be polled
// PRECONDITION: the request file has been created
//
int SCHEDULER_OP::start_rpc(PROJECT* p) {
int retval;
char request_file[1024], reply_file[1024];
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
safe_strcpy(scheduler_url, p->get_scheduler_url(url_index, url_random));
if (log_flags.sched_ops) {
msg_printf(
p, MSG_INFO,
"Sending scheduler request to %s\n", scheduler_url
);
const char* why;
switch (reason) {
case REASON_USER_REQ: why = "Requested by user"; break;
case REASON_NEED_WORK: why = "To fetch work"; break;
case REASON_RESULTS_DUE: why = "To report results"; break;
case REASON_TRICKLE_UP: why = "To send trickle-up message"; break;
default: why = "Unknown";
}
msg_printf(p, MSG_INFO, "Reason: %s", why);
if (p->work_request != 0.0 && p->nresults_returned != 0) {
msg_printf(
p, MSG_INFO,
(p->work_request >= 1.0) ?
"Requesting %.0f seconds of new work, and reporting %d results\n":
"Requesting %g seconds of new work, and reporting %d results\n",
p->work_request, p->nresults_returned
);
} else if (p->work_request != 0) {
msg_printf(
p, MSG_INFO,
(p->work_request >= 1.0) ?
"Requesting %.0f seconds of new work\n":
"Requesting %g seconds of new work\n",
p->work_request
);
} else if (p->nresults_returned != 0) {
msg_printf(
p, MSG_INFO,
"Reporting %d results\n",
p->nresults_returned
);
} else {
msg_printf(
p, MSG_INFO,
"Note: not requesting new work or reporting results\n"
);
}
}
get_sched_request_filename(*p, request_file);
get_sched_reply_filename(*p, reply_file);
scope_messages.printf_file(request_file, "req:");
http_op.set_proxy(&gstate.proxy_info);
retval = http_op.init_post(scheduler_url, request_file, reply_file);
if (retval) {
msg_printf(p, MSG_ERROR,
"Scheduler request failed: %s", boincerror(retval)
);
return retval;
}
retval = http_ops->insert(&http_op);
if (retval) {
msg_printf(p, MSG_ERROR,
"Scheduler request failed: %s", boincerror(retval)
);
return retval;
}
p->rpc_seqno++;
cur_proj = p; // remember what project we're talking to
state = SCHEDULER_OP_STATE_RPC;
return 0;
}
// initiate a fetch of a project's master URL file
//
int SCHEDULER_OP::init_master_fetch(PROJECT* p) {
int retval;
char master_filename[256];
get_master_filename(*p, master_filename);
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
scope_messages.printf(
"SCHEDULER_OP::init_master_fetch(): Fetching master file for %s\n",
p->master_url
);
http_op.set_proxy(&gstate.proxy_info);
retval = http_op.init_get(p->master_url, master_filename, true);
if (retval) return retval;
retval = http_ops->insert(&http_op);
if (retval) return retval;
cur_proj = p;
state = SCHEDULER_OP_STATE_GET_MASTER;
return 0;
}
// parse a master file.
//
int SCHEDULER_OP::parse_master_file(PROJECT* p, vector<std::string> &urls) {
char buf[256];
char master_filename[256];
std::string str;
FILE* f;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
get_master_filename(*p, master_filename);
f = boinc_fopen(master_filename, "r");
if (!f) {
msg_printf(p, MSG_ERROR, "Can't open master file\n");
return ERR_FOPEN;
}
p->scheduler_urls.clear();
while (fgets(buf, 256, f)) {
// allow for the possibility of > 1 tag per line here
// (UMTS may collapse lines)
//
char* q = buf;
while (q && parse_str(q, "<scheduler>", str)) {
strip_whitespace(str);
urls.push_back(str);
q = strstr(q, "</scheduler>");
if (q) q += strlen("</schedule>");
}
}
fclose(f);
scope_messages.printf("SCHEDULER_OP::parse_master_file(): got %d scheduler URLs\n", (int)urls.size());
// couldn't find any scheduler URLs in the master file?
//
if ((int) urls.size() == 0) {
return ERR_XML_PARSE;
}
return 0;
}
// A master file has just been read.
// transfer scheduler URLs to project.
// Return true if any of them is new
//
bool SCHEDULER_OP::update_urls(PROJECT* p, vector<std::string> &urls) {
unsigned int i, j;
bool found, any_new;
any_new = false;
for (i=0; i<urls.size(); i++) {
found = false;
for (j=0; j<p->scheduler_urls.size(); j++) {
if (urls[i] == p->scheduler_urls[j]) {
found = true;
break;
}
}
if (!found) any_new = true;
}
p->scheduler_urls.clear();
for (i=0; i<urls.size(); i++) {
p->scheduler_urls.push_back(urls[i]);
}
return any_new;
}
// poll routine. If an operation is in progress, check for completion
//
bool SCHEDULER_OP::poll() {
int retval, nresults;
vector<std::string> urls;
bool changed, scheduler_op_done;
bool err = false;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
switch(state) {
case SCHEDULER_OP_STATE_GET_MASTER:
// here we're fetching the master file for a project
//
if (http_op.http_op_state == HTTP_STATE_DONE) {
state = SCHEDULER_OP_STATE_IDLE;
cur_proj->master_url_fetch_pending = false;
http_ops->remove(&http_op);
gstate.set_client_state_dirty("master URL fetch done");
if (http_op.http_op_retval == 0) {
scope_messages.printf(
"SCHEDULER_OP::poll(): Got master file from %s; parsing\n",
cur_proj->master_url
);
retval = parse_master_file(cur_proj, urls);
if (retval || (urls.size()==0)) {
// master file parse failed.
//
if (cur_proj->tentative) {
PROJECT* project_temp = cur_proj;
cur_proj = 0; // keep detach(0) from removing HTTP OP
project_temp->attach_failed(ERR_ATTACH_FAIL_PARSE);
err = true;
} else {
cur_proj->master_fetch_failures++;
backoff(cur_proj, "Master file parse failed\n");
}
} else {
// parse succeeded
//
msg_printf(cur_proj, MSG_INFO, "Master page download succeeded");
cur_proj->master_fetch_failures = 0;
changed = update_urls(cur_proj, urls);
// reenable scheduler RPCs if have new URLs
//
if (changed) {
cur_proj->min_rpc_time = 0;
cur_proj->nrpc_failures = 0;
}
}
} else {
// master file fetch failed.
//
if (cur_proj->tentative) {
PROJECT* project_temp = cur_proj;
cur_proj = 0;
project_temp->attach_failed(ERR_ATTACH_FAIL_DOWNLOAD);
} else {
cur_proj->master_fetch_failures++;
backoff(cur_proj, "Master file fetch failed\n");
}
}
cur_proj = NULL;
return true;
}
break;
case SCHEDULER_OP_STATE_RPC:
// here we're doing a scheduler RPC
//
scheduler_op_done = false;
if (http_op.http_op_state == HTTP_STATE_DONE) {
state = SCHEDULER_OP_STATE_IDLE;
http_ops->remove(&http_op);
if (http_op.http_op_retval) {
if (log_flags.sched_ops) {
msg_printf(cur_proj, MSG_ERROR,
"Scheduler request to %s failed with a return value of %d\n",
cur_proj->get_scheduler_url(url_index, url_random), http_op.http_op_retval
);
}
// scheduler RPC failed. Try another scheduler if one exists
//
while (1) {
url_index++;
if (url_index == (int)cur_proj->scheduler_urls.size()) {
break;
}
retval = start_rpc(cur_proj);
if (!retval) return true;
}
if (url_index == (int) cur_proj->scheduler_urls.size()) {
backoff(cur_proj, "No schedulers responded");
scheduler_op_done = true;
}
} else {
if (log_flags.sched_ops) {
msg_printf(
cur_proj, MSG_INFO,
"Scheduler request to %s succeeded\n",
cur_proj->get_scheduler_url(url_index, url_random)
);
}
retval = gstate.handle_scheduler_reply(cur_proj, scheduler_url, nresults);
// if this was a tentative project and we didn't get user name,
// the account ID must be bad. Tell the user.
//
if (cur_proj->tentative) {
if (retval || strlen(cur_proj->user_name)==0) {
cur_proj->attach_failed(ERR_ATTACH_FAIL_BAD_KEY);
} else {
cur_proj->tentative = false;
gstate.have_tentative_project = false;
retval = cur_proj->write_account_file();
if (retval) {
cur_proj->attach_failed(ERR_ATTACH_FAIL_FILE_WRITE);
} else {
gstate.project_attach.error_num = 0;
msg_printf(cur_proj, MSG_INFO,
"Successfully attached to %s",
cur_proj->get_project_name()
);
}
}
} else {
switch (retval) {
case 0:
// if we asked for work and didn't get any,
// back off this project
//
if (reason==REASON_NEED_WORK && nresults==0) {
backoff(cur_proj, "No work from project\n");
} else {
cur_proj->nrpc_failures = 0;
}
break;
case ERR_PROJECT_DOWN:
backoff(cur_proj, "Project is down");
break;
default:
backoff(cur_proj, "Can't parse scheduler reply");
break;
}
}
}
cur_proj = NULL;
return true;
}
}
return false;
}
void SCHEDULER_OP::abort(PROJECT* p) {
if (state != SCHEDULER_OP_STATE_IDLE && cur_proj == p) {
gstate.http_ops->remove(&http_op);
state = SCHEDULER_OP_STATE_IDLE;
cur_proj = NULL;
}
}
SCHEDULER_REPLY::SCHEDULER_REPLY() {
global_prefs_xml = 0;
project_prefs_xml = 0;
code_sign_key = 0;
code_sign_key_signature = 0;
}
SCHEDULER_REPLY::~SCHEDULER_REPLY() {
if (global_prefs_xml) free(global_prefs_xml);
if (project_prefs_xml) free(project_prefs_xml);
if (code_sign_key) free(code_sign_key);
if (code_sign_key_signature) free(code_sign_key_signature);
}
// parse a scheduler reply.
// Some of the items go into the SCHEDULER_REPLY object.
// Others are copied straight to the PROJECT
//
int SCHEDULER_REPLY::parse(FILE* in, PROJECT* project) {
char buf[256], msg_buf[1024], pri_buf[256];
int retval;
MIOFILE mf;
std::string delete_file_name;
mf.init_file(in);
bool found_start_tag = false;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
hostid = 0;
request_delay = 0;
global_prefs_xml = 0;
project_prefs_xml = 0;
strcpy(host_venue, "");
code_sign_key = 0;
code_sign_key_signature = 0;
message_ack = false;
project_is_down = false;
send_file_list = false;
messages.clear();
// First line should either be tag (HTTP 1.0) or
// hex length of response (HTTP 1.1)
//
while (fgets(buf, 256, in)) {
if (!found_start_tag) {
if (match_tag(buf, "<scheduler_reply")) {
found_start_tag = true;
}
continue;
}
if (match_tag(buf, "</scheduler_reply>")) {
// update statistics after parsing the scheduler reply
// check if vector is empty or we have a new day
if (project->statistics.empty() || project->statistics.back().day!=dday()) {
// check if max. number of statistics already saved
while (project->statistics.size()>30) {
project->statistics.erase(project->statistics.begin());
}
DAILY_STATS nds;
project->statistics.push_back(nds);
}
DAILY_STATS& ds = project->statistics.back();
ds.day=dday();
ds.user_total_credit=project->user_total_credit;
ds.user_expavg_credit=project->user_expavg_credit;
ds.host_total_credit=project->host_total_credit;
ds.host_expavg_credit=project->host_expavg_credit;
project->write_statistics_file();
return 0;
}
else if (parse_str(buf, "<project_name>", project->project_name, sizeof(project->project_name))) continue;
else if (parse_str(buf, "<user_name>", project->user_name, sizeof(project->user_name))) continue;
else if (parse_double(buf, "<user_total_credit>", project->user_total_credit)) continue;
else if (parse_double(buf, "<user_expavg_credit>", project->user_expavg_credit)) continue;
else if (parse_double(buf, "<user_create_time>", project->user_create_time)) continue;
else if (parse_str(buf, "<team_name>", project->team_name, sizeof(project->team_name))) continue;
else if (parse_int(buf, "<hostid>", hostid)) continue;
else if (parse_double(buf, "<host_total_credit>", project->host_total_credit)) continue;
else if (parse_double(buf, "<host_expavg_credit>", project->host_expavg_credit)) continue;
else if (parse_str(buf, "<host_venue>", host_venue, sizeof(host_venue))) continue;
else if (parse_double(buf, "<host_create_time>", project->host_create_time)) continue;
else if (parse_double(buf, "<request_delay>", request_delay)) continue;
else if (match_tag(buf, "<global_preferences>")) {
retval = dup_element_contents(
in,
"</global_preferences>",
&global_prefs_xml
);
if (retval) return ERR_XML_PARSE;
msg_printf(project, MSG_INFO,
"General preferences have been updated\n"
);
} else if (match_tag(buf, "<project_preferences>")) {
retval = dup_element_contents(
in,
"</project_preferences>",
&project_prefs_xml
);
if (retval) return ERR_XML_PARSE;
} else if (match_tag(buf, "<gui_urls>")) {
std::string foo;
retval = copy_element_contents(in, "</gui_urls>", foo);
if (!retval) {
project->gui_urls = "<gui_urls>\n"+foo+"</gui_urls>\n";
}
continue;
#if 0
} else if (match_tag(buf, "<deletion_policy_priority/>")) {
project->deletion_policy_priority = true;
continue;
} else if (match_tag(buf, "<deletion_policy_expire>")) {
project->deletion_policy_expire = true;
continue;
#endif
} else if (match_tag(buf, "<code_sign_key>")) {
retval = dup_element_contents(
in,
"</code_sign_key>",
&code_sign_key
);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse code sign key in scheduler reply: %d",
retval
);
return ERR_XML_PARSE;
}
} else if (match_tag(buf, "<code_sign_key_signature>")) {
retval = dup_element_contents(
in,
"</code_sign_key_signature>",
&code_sign_key_signature
);
if (retval) return ERR_XML_PARSE;
} else if (match_tag(buf, "<app>")) {
APP app;
retval = app.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse app in scheduler reply: %d", retval
);
} else {
apps.push_back(app);
}
} else if (match_tag(buf, "<file_info>")) {
FILE_INFO file_info;
retval = file_info.parse(mf, true);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse file info in scheduler reply: %d", retval
);
} else {
file_infos.push_back(file_info);
}
} else if (match_tag(buf, "<app_version>")) {
APP_VERSION av;
retval = av.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse app version in scheduler reply: %d", retval
);
} else {
app_versions.push_back(av);
}
} else if (match_tag(buf, "<workunit>")) {
WORKUNIT wu;
retval = wu.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse work unit in scheduler reply: %d", retval
);
} else {
workunits.push_back(wu);
}
} else if (match_tag(buf, "<result>")) {
RESULT result; // make sure this is here so constructor
// gets called each time
retval = result.parse_server(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse result in scheduler reply: %d", retval
);
} else {
results.push_back(result);
}
} else if (match_tag(buf, "<result_ack>")) {
RESULT result;
retval = result.parse_ack(in);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse result ack in scheduler reply: %d", retval
);
} else {
result_acks.push_back(result);
}
} else if (parse_str(buf, "<delete_file_info>", delete_file_name)) {
file_deletes.push_back(delete_file_name);
} else if (parse_str(buf, "<message", msg_buf, sizeof(msg_buf))) {
parse_attr(buf, "priority", pri_buf, sizeof(pri_buf));
USER_MESSAGE um(msg_buf, pri_buf);
messages.push_back(um);
continue;
} else if (match_tag(buf, "<message_ack/>")) {
message_ack = true;
} else if (match_tag(buf, "<project_is_down/>")) {
project_is_down = true;
} else if (parse_str(buf, "<email_hash>", project->email_hash, sizeof(project->email_hash))) {
continue;
} else if (parse_str(buf, "<cross_project_id>", project->cross_project_id, sizeof(project->cross_project_id))) {
continue;
} else if (match_tag(buf, "<trickle_down>")) {
retval = gstate.handle_trickle_down(project, in);
if (retval) {
msg_printf(project, MSG_ERROR,
"handle_trickle_down failed: %d\n", retval
);
}
continue;
} else if (parse_bool(buf, "non_cpu_intensive", project->non_cpu_intensive)) {
continue;
} else if (match_tag(buf, "<request_file_list/>")) {
send_file_list = true;
} else if (strlen(buf)>1){
scope_messages.printf("SCHEDULER_REPLY::parse(): unrecognized %s\n", buf);
}
}
if (found_start_tag) {
msg_printf(project, MSG_ERROR, "No close tag in scheduler reply\n");
} else {
msg_printf(project, MSG_ERROR, "No start tag in scheduler reply\n");
}
return ERR_XML_PARSE;
}
USER_MESSAGE::USER_MESSAGE(char* m, char* p) {
message = m;
priority = p;
}
const char *BOINC_RCSID_11c806525b = "$Id$";
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